UVIP used to work but I think you need the ownership now to buy it. We used to have a Service Ontario owner here, (DrToronto)but I haven’t heard from him in a while. Otherwise if you know a dealer they can do a lien search and it should bring up the current registered owner for you.
I’d like to find the owner of an 86 GT I sold on there years ago too, but I can’t seem to load a pic on here, lmao.